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Please help with Athlon II X4 630 overclocking

post #1 of 19
Thread Starter 
Hi guys I'm new to overclocking and it's been a very frustrating week for me.

Here's my setup:

AMD Athlon II X4 630 CPU (2.8ghz stock)
Asus M4A785TD-V Evo motherboard (AM3)
Thermax Eclipse II 6 CopperPipe Heatsink (It's very good, big temperature drop vs Stock)
1333 DDR Ram (The label on the ram says 1600oc and I have no idea why)
Radeon 5750 1G DDR5


I've been doing alot of homework and my results are follows:

3.4Ghz Running stable max load with Prime95
3.5Ghz Crashing after 1 hour @ max load with Prime 95.

By default running at 2.8Ghz my CoreVoltage is 1.4 / NBVoltage 1.175
When I over clocked to 3.4Ghz or 3.5Ghz I set it at CoreVoltage 1.5 / NBVoltage 1.375

Been doing this all week and these are the settings that I don't crash so much with...
I haven't had a crash yet at 3.4Ghz, but I think I have my core voltage higher than what it's suppose to be... what I
mean is I see people running stable at 3.5Ghz with only 1.14 Core V....
I'm sure my Voltage on my Ram or chipset might need adjustment, or HTLink Mhz as well but I have no idea what the
values should be...

Here's a screenshot of my CPU-Z

192

I would like to run at 3.5Ghz or more, do you guys think it's possible? I need more knowledge on other settings other
than just the Core Voltage and NB Voltage adjustments >_<<br />
Thanks in advance.
Edited by Lyane - 4/8/12 at 9:15am
post #2 of 19
You need to lower the Hyper Transport (HT) multiplier. Overclocking it usually leads to a decrease in graphics performance as well as instability. Leave it as close to 2000 Mhz as possible.
post #3 of 19
Thread Starter 
I've lowered my HTLink and leaving it on 2000now. It was too high at 2400 I guess?

Anyhow it's sitting nicely at 2000mhz and I'm getting better results with prime95.

Before it would bsod without load in 15mins @ 3.5ghz
Now it stayed on for longer than an hour with max load @ 3.5Ghz.

What shall I look into next?
post #4 of 19
Yes there is absolutely no benefit to overclocking the HT link. In your first post you asked about your voltage being too high. I would say its fine, as only intel cpus can work with voltages that low.

When you say you raised the northbridge voltage, did you raise the northbridge (chipset) or the cpu northbridge (CPU-NB/memory controler)? This is really important since you already have your CPU-NB overclocked to 2440 mhz (Labeled as NB under the memory tab in CPU-z).

If you have not raised your CPU-NB voltage then that will cause instability, which also may be why you need such high voltage for the OC you currently have. I used to have a Athlon II 630 and it only took 1.43 volts to get to 3.5 Ghz
post #5 of 19
With Phenom II chips I have seen that setting the NB and CPU volts to the same value yields better stability and much higher overclocks.


I have an Athlon X2 215 running at 3.7Ghz core and 2.7Ghz cpu_nb with 1.5v on both.

Both are made on the same silicon and should be good for the same voltages. I have a suspicion that when the voltages are different there are signaling issues when much higher than stock clocks.

My X2 550 BE can only hit 3.7 with both voltages set the same, but the board it is in doesnt have proper settings for the cpu_nb voltage, so it is limited to around 3.4-3.5Ghz
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post #6 of 19
Thread Starter 
When I NB voltage I meant the CPU/NB Voltage (VDDNB in bios) which is also the 2nd option in Asus Turbo V.

561

after playing with it all night long I've accomplished to get this result.

3.5Ghz stable, but at the cost of 1.52 core v

even at stock 2.8Ghz the core V was 1.4v, I think these cpus are suppose to run this high.
post #7 of 19
Thread Starter 
Really? setting them both to 1.5? it sounds dangerous but it's worth a shot. I'm gonna try it.

I always thought 3.5 was my limit because when I get 3.6 and beyond the system won't even boot past the bios screen properly.
post #8 of 19
Its not dangerous in the least. The only reason it is set up like that from the get go was to reduce heat output from the sram cache in the cpu_nb.

They are good for the same operating voltage due to being made from the same materials, and being the same size transistors. Its just that you get more transistors per square inch in cache structures, which the nb has a lot of, which in turn makes more heat.
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post #9 of 19
Did you tried a higher cpu base clock? 240 MHz is a bit tight. I've a Phenom X2 550 and I've my base clock at 330 MHz.
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post #10 of 19
Running the base clock that high has no real benefits on most AMD processors.

The only reason to drop the multiplier is to get away from the 0.5 ones or push the bus up a bit to oc memory more, which does not get much of an improvement on Phenom II from my testing.
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